Patents by Inventor Kitae YEOM

Kitae YEOM has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 9657595
    Abstract: A bearing unit of a turbocharger may be disposed on an inner side of a space in a center housing and carry axial load of a rotary shaft connecting a turbine wheel, a compressor wheel, and an electric motor. The bearing unit may include a bearing body fastened to a side of the center housing and has a through-hole substantially at a center of the bearing body, and a coupling disposed in the through-hole and on the rotary shaft, having a stepped portion in which the bearing body is inserted, and forming an oil chamber with the bearing body.
    Type: Grant
    Filed: December 6, 2013
    Date of Patent: May 23, 2017
    Assignee: Hyundai Motor Company
    Inventors: Kitae Yeom, Jaesik Yang, Sung Won Kim, Tae Won Hwang, Hong-Young Lee
  • Patent number: 9583998
    Abstract: A rotor assembling method for a turbo-charger may include washing and preparing components of a rotor having a connector, a permanent magnet, end caps, a retention ring, and a center pipe, inserting the connector into the permanent magnet, thermally inserting one or more end caps into the connector by cooling the connector and heating the one or more end caps under a first high-temperature condition for a first predetermined time to form a permanent magnet assembly, thermally inserting the permanent magnet assembly into the retention ring by cooling the permanent magnet assembly and heating the retention ring under a second high-temperature condition for a second predetermined time to form a rotor assembly, thermally inserting the center pipe into the rotor assembly by heating the rotor assembly under a third high-temperature condition for a third predetermined time to form a rotor assembling body, and post processing the rotor assembling body.
    Type: Grant
    Filed: December 6, 2013
    Date of Patent: February 28, 2017
    Assignee: Hyundai Motor Company
    Inventors: Kitae Yeom, Jaesik Yang, Sung Won Kim, Tae Won Hwang, Jae Man Lim, Hong-Young Lee
  • Patent number: 9407182
    Abstract: A sensorless control method and system for a motor are provided. The includes a back EMF observer that is configured to estimate a back EMF of the motor and an angle error calculator that is configured to calculate an electrical angle error considering iron loss of the motor based on the back EMF estimated by the back EMF observer. An angle error compensator is configured to compensate the electrical angle error calculated by the angle error calculator. An electrical angle for compensating the calculated electrical angle error is obtained through simulation or experiment for the motor. In addition, a PLL controller is configured to receive the compensated electrical angle to estimate an actual angle by reducing the electrical angle error due to the iron loss, and to operate the motor based on the estimated actual angle.
    Type: Grant
    Filed: December 1, 2014
    Date of Patent: August 2, 2016
    Assignees: Hyundai Motor Company, Postech Academy-Industry Foundation
    Inventors: Jaesik Yang, Sungwon Kim, Kitae Yeom, Taewon Hwang, Junwoo Kim, Kwang-Hee Nam
  • Patent number: 9359965
    Abstract: A turbocharger system includes a compressor that is connected with a turbine operated by an exhaust gas by a rotary shaft and compresses and supplies external gas to a combustion chamber of an engine, an intercooler and a throttle valve disposed in an intake line connecting the compressor with the combustion chamber of the engine, a branch line connecting an intake line between the compressor and the intercooler with an intake line between the intercooler and the throttle valve, a shutoff valve disposed in the branch line to selectively open/close the branch line, and an engine control unit controlling the operation of the shutoff valve.
    Type: Grant
    Filed: December 6, 2013
    Date of Patent: June 7, 2016
    Assignee: Hyundai Motor Company
    Inventors: Kitae Yeom, Jaesik Yang, Sung Won Kim, Tae Won Hwang, Hong-Young Lee
  • Patent number: 9356546
    Abstract: A sensorless control method for a motor performed by a sensorless controller including a back electromotive force (EMF) observer and a phase locked loop (PLL) controller, includes: estimating a back EMF of the motor using the back EMF observer; calculating an electrical angle error in accordance with iron loss of the motor based on the estimated back EMF; and compensating for the calculated electrical angle error, inputting the compensated electrical angle error into the PLL controller to estimate an actual angle, and controlling the motor based on the estimated actual angle.
    Type: Grant
    Filed: November 23, 2014
    Date of Patent: May 31, 2016
    Assignees: Hyundai Motor Company, Postech Academy-Industry Foundation
    Inventors: Jaesik Yang, Kitae Yeom, Sung Won Kim, Tae Won Hwang, Jun Woo Kim, Kwang-Hee Nam
  • Publication number: 20160099667
    Abstract: A sensorless control method and system for a motor are provided. The includes a back EMF observer that is configured to estimate a back EMF of the motor and an angle error calculator that is configured to calculate an electrical angle error considering iron loss of the motor based on the back EMF estimated by the back EMF observer. An angle error compensator is configured to compensate the electrical angle error calculated by the angle error calculator. An electrical angle for compensating the calculated electrical angle error is obtained through simulation or experiment for the motor. In addition, a PLL controller is configured to receive the compensated electrical angle to estimate an actual angle by reducing the electrical angle error due to the iron loss, and to operate the motor based on the estimated actual angle.
    Type: Application
    Filed: December 1, 2014
    Publication date: April 7, 2016
    Inventors: Jaesik Yang, Sungwon Kim, Kitae Yeom, Taewon Hwang, Junwoo Kim, Kwang-Hee Nam
  • Publication number: 20150365029
    Abstract: A sensorless control method for a motor performed by a sensorless controller including a back electromotive force (EMF) observer and a phase locked loop (PLL) controller, includes: estimating a back EMF of the motor using the back EMF observer; calculating an electrical angle error in accordance with iron loss of the motor based on the estimated back EMF; and compensating for the calculated electrical angle error, inputting the compensated electrical angle error into the PLL controller to estimate an actual angle, and controlling the motor based on the estimated actual angle.
    Type: Application
    Filed: November 23, 2014
    Publication date: December 17, 2015
    Inventors: Jaesik Yang, Kitae Yeom, Sung Won Kim, Tae Won Hwang, Jun Woo Kim, Kwang-Hee Nam
  • Publication number: 20140182287
    Abstract: A turbocharger system includes a compressor that is connected with a turbine operated by an exhaust gas by a rotary shaft and compresses and supplies external gas to a combustion chamber of an engine, an intercooler and a throttle valve disposed in an intake line connecting the compressor with the combustion chamber of the engine, a branch line connecting an intake line between the compressor and the intercooler with an intake line between the intercooler and the throttle valve, a shutoff valve disposed in the branch line to selectively open/close the branch line, and an engine control unit controlling the operation of the shutoff valve
    Type: Application
    Filed: December 6, 2013
    Publication date: July 3, 2014
    Applicants: NEUROS CO., LTD., Hyundai Motor Company
    Inventors: Kitae YEOM, Jaesik Yang, Sung Won Kim, Tae Won Hwang, Hong-Young Lee
  • Publication number: 20140186159
    Abstract: A bearing unit of a turbocharger may be disposed on an inner side of a space in a center housing and carry axial load of a rotary shaft connecting a turbine wheel, a compressor wheel, and an electric motor. The bearing unit may include a bearing body fastened to a side of the center housing and has a through-hole substantially at a center of the bearing body for fitting the rotary shaft fitted, and a coupling disposed on the through-hole and the rotary shaft, having a stepped portion in which the bearing body is inserted, and forming an oil chamber with the bearing body.
    Type: Application
    Filed: December 6, 2013
    Publication date: July 3, 2014
    Applicants: NEUROS CO., LTD., Hyundai Motor Company
    Inventors: Kitae YEOM, Jaesik Yang, Sung Won Kim, Tae Won Hwang, Hong-Young Lee
  • Publication number: 20140184006
    Abstract: A rotor assembling method for a turbo-charger may include washing and preparing components of a rotor having a connector, a permanent magnet, end caps, a retention ring, and a center pipe, inserting the connector into the permanent magnet, thermally inserting one or more end caps into the connector by cooling the connector and heating the one or more end caps under a first high-temperature condition for a first predetermined time to form a permanent magnet assembly, thermally inserting the permanent magnet assembly into the retention ring by cooling the permanent magnet assembly and heating the retention ring under a second high-temperature condition for a second predetermined time to form a rotor assembly, thermally inserting the center pipe into the rotor assembly by heating the rotor assembly under a third high-temperature condition for a third predetermined time to form a rotor assembling body, and post processing the rotor assembling body.
    Type: Application
    Filed: December 6, 2013
    Publication date: July 3, 2014
    Applicants: Neuros Co., Ltd., Hyundai Motor Company
    Inventors: Kitae YEOM, Jaesik YANG, Sung Won KIM, TaeWon HWANG, Jae Man LIM, Hong-Young LEE